BOSTON — Patrick Brown scored the tiebreaking goal with 5½ minutes left and added another in the closing seconds, lifting Boston College to its school-record fifth straight Beanpot championship with a 4-1 win over Northeastern on Monday night.

The Eagles (22-4-3) extended their unbeaten streak to 15 games (14-0-1) on the same day they took over the No. 1 spot in the national rankings.

Johnny Gaudreau, the leading scorer in the country, extended his nation-best point streak to 24 games with an empty-net goal and an assist. Kevin Hayes had the other goal for BC.

The annual tournament, which dates to 1952, pits the Boston area’s four Division I hockey programs against each other on the first two Mondays in February.

Boston College won its 19th Beanpot, second-most behind Boston University with 29.

Northeastern was looking for its fifth Beanpot title — by far the fewest among the four schools — and first since 1988. BC and BU have combined to win every one since 1994.

Boston College’s five-year streak is the second-longest in Beanpot history to the run of six in a row by rival BU from 1995-2000.

This was the second straight year BC and Northeastern played for the championship. Boston College won 6-3 last year.

Brown, who was battling in front of the net with Stevens, tipped defenseman Isaac MacLeod’s shot from the point a split second after he fell to his backside, reaching his stick to his right and tipping the shot with the blade. The puck changed direction and slid inside the right post.

With Northeastern trailing 1-0 late in the second period, Kevin Roy intercepted a pass from defenseman Scott Savage near the right circle and broke in alone. BC goalie Thatcher Demko made a pad save, but Stevens backhanded the rebound past his glove inside the left post at 18:36.

Demko made 29 saves.

Boston College grabbed a 1-0 lead 8:40 into the first period when Hayes beat Witt with a wrister between the pads from the slot. Gaudreau broke in down the right wing and centered a pass that linemate Bill Arnold tipped back to Hayes. Gaudreau has 25 goals and 33 assists.

Witt made a couple of stellar stops in the opening period, dropping for a pad save on Hayes’ clean breakaway late in the period. He also waved his stick across the crease, knocking Gaudreau’s shot just wide at the last second before it appeared to be heading inside the left post.

The Huskies appeared to gain a spark from Witt’s strong play, registering 11 of the final 14 shots on goal in the first.

Harvard (7-12-3) won the third-place game 6-2 over Boston University (8-16-3).